I am facing same issue like (https://github.com/elastic/elasticsearch/issues/33075), any suggestion?
$ ./elasticsearch
[2018-10-22T07:14:57,429][INFO ][o.e.n.Node ] [] initializing ...
[2018-10-22T07:14:57,491][INFO ][o.e.e.NodeEnvironment ] [tICd8KV] using [1] data paths, mounts [[/ (/dev/mapper/turnkey-root)]], net usable_space [13gb], net total_space [16.6gb], types [ext4]
[2018-10-22T07:14:57,491][INFO ][o.e.e.NodeEnvironment ] [tICd8KV] heap size [1007.3mb], compressed ordinary object pointers [true]
[2018-10-22T07:14:57,493][INFO ][o.e.n.Node ] [tICd8KV] node name derived from node ID [tICd8KVbR3OD0c7Qe2D6_w]; set [node.name] to override
[2018-10-22T07:14:57,493][INFO ][o.e.n.Node ] [tICd8KV] version[6.4.2], pid[13993], build[default/tar/04711c2/2018-09-26T13:34:09.098244Z], OS[Linux/4.9.0-8-amd64/amd64], JVM[Oracle Corporation/OpenJDK 64-Bit Server VM/1.8.0_181/25.181-b13]
[2018-10-22T07:14:57,493][INFO ][o.e.n.Node ] [tICd8KV] JVM arguments [-Xms1g, -Xmx1g, -XX:+UseConcMarkSweepGC, -XX:CMSInitiatingOccupancyFraction=75, -XX:+UseCMSInitiatingOccupancyOnly, -XX:+AlwaysPreTouch, -Xss1m, -Djava.awt.headless=true, -Dfile.encoding=UTF-8, -Djna.nosys=true, -XX:-OmitStackTraceInFastThrow, -Dio.netty.noUnsafe=true, -Dio.netty.noKeySetOptimization=true, -Dio.netty.recycler.maxCapacityPerThread=0, -Dlog4j.shutdownHookEnabled=false, -Dlog4j2.disable.jmx=true, -Djava.io.tmpdir=/tmp/elasticsearch.OfLoRSmo, -XX:+HeapDumpOnOutOfMemoryError, -XX:HeapDumpPath=data, -XX:ErrorFile=logs/hs_err_pid%p.log, -XX:+PrintGCDetails, -XX:+PrintGCDateStamps, -XX:+PrintTenuringDistribution, -XX:+PrintGCApplicationStoppedTime, -Xloggc:logs/gc.log, -XX:+UseGCLogFileRotation, -XX:NumberOfGCLogFiles=32, -XX:GCLogFileSize=64m, -Des.path.home=/ElasticSearch/elasticsearch-6.4.2, -Des.path.conf=/ElasticSearch/elasticsearch-6.4.2/config, -Des.distribution.flavor=default, -Des.distribution.type=tar]
[2018-10-22T07:14:59,118][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [aggs-matrix-stats]
[2018-10-22T07:14:59,118][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [analysis-common]
[2018-10-22T07:14:59,119][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [ingest-common]
[2018-10-22T07:14:59,119][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [lang-expression]
[2018-10-22T07:14:59,119][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [lang-mustache]
[2018-10-22T07:14:59,119][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [lang-painless]
[2018-10-22T07:14:59,120][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [mapper-extras]
[2018-10-22T07:14:59,120][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [parent-join]
[2018-10-22T07:14:59,120][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [percolator]
[2018-10-22T07:14:59,120][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [rank-eval]
[2018-10-22T07:14:59,121][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [reindex]
[2018-10-22T07:14:59,121][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [repository-url]
[2018-10-22T07:14:59,121][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [transport-netty4]
[2018-10-22T07:14:59,121][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [tribe]
[2018-10-22T07:14:59,121][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [x-pack-core]
[2018-10-22T07:14:59,121][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [x-pack-deprecation]
[2018-10-22T07:14:59,121][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [x-pack-graph]
...
[2018-10-22T07:14:59,123][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [x-pack-sql]
[2018-10-22T07:14:59,123][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [x-pack-upgrade]
[2018-10-22T07:14:59,123][INFO ][o.e.p.PluginsService ] [tICd8KV] loaded module [x-pack-watcher]
[2018-10-22T07:14:59,124][INFO ][o.e.p.PluginsService ] [tICd8KV] no plugins loaded
[2018-10-22T07:15:03,293][INFO ][o.e.x.s.a.s.FileRolesStore] [tICd8KV] parsed [0] roles from file [/ElasticSearch/elasticsearch-6.4.2/config/roles.yml]
[2018-10-22T07:15:03,819][INFO ][o.e.x.m.j.p.l.CppLogMessageHandler] [controller/14049] [Main.cc@109] controller (64 bit): Version 6.4.2 (Build 660eefe6f2ea55) Copyright (c) 2018 Elasticsearch BV
[2018-10-22T07:15:04,165][DEBUG][o.e.a.ActionModule ] Using REST wrapper from plugin org.elasticsearch.xpack.security.Security
[2018-10-22T07:15:04,379][INFO ][o.e.d.DiscoveryModule ] [tICd8KV] using discovery type [zen]
[2018-10-22T07:15:05,202][INFO ][o.e.n.Node ] [tICd8KV] initialized
[2018-10-22T07:15:05,202][INFO ][o.e.n.Node ] [tICd8KV] starting ...
[2018-10-22T07:15:05,349][INFO ][o.e.t.TransportService ] [tICd8KV] publish_address {127.0.0.1:9300}, bound_addresses {[::1]:9300}, {127.0.0.1:9300}
[2018-10-22T07:15:05,408][WARN ][o.e.b.BootstrapChecks ] [tICd8KV] max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[2018-10-22T07:15:08,460][INFO ][o.e.c.s.MasterService ] [tICd8KV] zen-disco-elected-as-master ([0] nodes joined)[, ], reason: new_master {tICd8KV}{tICd8KVbR3OD0c7Qe2D6_w}{SxJHRZzURNulilvqW7A6KA}{127.0.0.1}{127.0.0.1:9300}{ml.machine_memory=4148072448, xpack.installed=true, ml.max_open_jobs=20, ml.enabled=true}
[2018-10-22T07:15:08,465][INFO ][o.e.c.s.ClusterApplierService] [tICd8KV] new_master {tICd8KV}{tICd8KVbR3OD0c7Qe2D6_w}{SxJHRZzURNulilvqW7A6KA}{127.0.0.1}{127.0.0.1:9300}{ml.machine_memory=4148072448, xpack.installed=true, ml.max_open_jobs=20, ml.enabled=true}, reason: apply cluster state (from master [master {tICd8KV}{tICd8KVbR3OD0c7Qe2D6_w}{SxJHRZzURNulilvqW7A6KA}{127.0.0.1}{127.0.0.1:9300}{ml.machine_memory=4148072448, xpack.installed=true, ml.max_open_jobs=20, ml.enabled=true} committed version [1] source [zen-disco-elected-as-master ([0] nodes joined)[, ]]])
[2018-10-22T07:15:08,540][INFO ][o.e.x.s.t.n.SecurityNetty4HttpServerTransport] [tICd8KV] publish_address {127.0.0.1:9200}, bound_addresses {[::1]:9200}, {127.0.0.1:9200}
[2018-10-22T07:15:08,540][INFO ][o.e.n.Node ] [tICd8KV] started
[2018-10-22T07:15:08,758][WARN ][o.e.x.s.a.s.m.NativeRoleMappingStore] [tICd8KV] Failed to clear cache for realms [[]]
[2018-10-22T07:15:08,804][INFO ][o.e.l.LicenseService ] [tICd8KV] license [8fcf289d-07d7-4b46-b60c-b4d007dba19e] mode [basic] - valid
[2018-10-22T07:15:08,821][INFO ][o.e.g.GatewayService ] [tICd8KV] recovered [0] indices into cluster_state